Africa's largest country, Sudan, is first and foremost part of the Arab world, sensitive to the political tides which sweep the Arab peoples from the Atlantic to the Gulf. Like other members of the Arab League, Sudan was taken by surprise by the defeat of 1967. It was shaken by the tidal wave that later engulfed Libya, Lebanon, Iraq, and Syria; and on 25 May 1969, a military regime took over in Khartoum. Its ideology was Arab nationalism infused with socialism; its social base, the army and the urban classes; and its model, the Nasserist experiment.